One of the four changes Munster make for the trip to Llanelli sees Dave Kilcoyne handed his first start.
Academy prop Kilcoyne's only other involvement at this level was back in December when he came of the bench in the 69th minute of Munster's game against Connacht in Galway.
Always highly regarded, he produced an impressive performance when Munster defeated Leinster A in the British & Irish Cup semi final a fortnight ago.
McGahan's one backline change is at nine, Conor Murray in for London Irish bound Tomas O'Leary and upfront, not surprisingly the return of Paul O'Connell meant one of the Os who started against Warriors had to go. So Donncha O'Callaghan is benched and Mick O'Driscoll, partners O'Connell in the second row.
The back-row remains the same with BJ Botha coming back into the front-row ahead of Stephen Archer.
Munster: F Jones; L O'Dea, J Murphy, L Mafi, S Zebo; I Keatley, C Murray; D Kilcoyne, M Sherry, BJ Botha; M O'Driscoll, P O'Connell capt; D Ryan, T O'Donnell, P O'Mahony.
Replacements: D Varley, W du Preez, S Archer, Donncha O'Callaghan, P Butler, T O'Leary, S Deasy, I Dineen